If you have a good Asian market in Manchester you should be able to find most of the ingredients there.

If you can't find what you need, I would look for Mae Ploy brand curry pastes from Thailand. They come in little cans or in larger, plastic tubs. There are probably a dozen varieties. I've used several of them and always been satisfied. They make a really quick meal, once you've chopped the vegetables and protein. Again, you will probably need to find an Asian market.

You might do better at a Chinese market. At least here in the US the Chinese markets are more likely to have S.E. Asian ingredients than the Indian markets are. A quick Google search of "Asian Grocers in Manchester UK" turns up several. If you have a Thai restaurant you like in the area, I'd ask them where to shop, too.